Biomaterial Database

[Action of polychlorinated biphenyls (Kanechlor 500 and Delor 106) and 3-methylcholanthrene on the activity of some rat liver microsomal enzymes]. 1978

G Butschak, and B Teichmann, and G Scheunig, and D Ziebarth

The influence of 3-methylcholanthrene and two commercially available mixtures of polychlorinated biphenyls (Kanechlor 500 and Delor 106) on the activity of some microsomal rat liver enzymes has been investigated. The studies included the demethylation of ethylmorphine, dimethylnitrosamine, and 4-dimethylaminoazobenzene as well as the investigation of the activity of aryl hydrocarbon hydroxylase and of azoreductase using benzo(a)pyrene and 4-dimethylaminoazobenzene as substrates, respectively. 3-methylcholanthrene induced the aryl hydrocarbon hydroxylase and azoreductase and led to an increase in the demethylation of 4-dimethylaminoazobenzene but not in the ethylmorphine demethylation. The relatively low increase in the dimethylnitrosamine demethylation was not statistically significant. These polychlorinated biphenyls caused a significant increase in all the enzyme activities studied. In most cases Delor 106 was more active than Kanechlor 500. The results are discussed and compared with those of other authors.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008748	Methylcholanthrene	A carcinogen that is often used in experimental cancer studies.	20-Methylcholanthrene,3-Methylcholanthrene,20 Methylcholanthrene,3 Methylcholanthrene
D008862	Microsomes, Liver	Closed vesicles of fragmented endoplasmic reticulum created when liver cells or tissue are disrupted by homogenization. They may be smooth or rough.	Liver Microsomes,Liver Microsome,Microsome, Liver
D010088	Oxidoreductases	The class of all enzymes catalyzing oxidoreduction reactions. The substrate that is oxidized is regarded as a hydrogen donor. The systematic name is based on donor:acceptor oxidoreductase. The recommended name will be dehydrogenase, wherever this is possible; as an alternative, reductase can be used. Oxidase is only used in cases where O2 is the acceptor. (Enzyme Nomenclature, 1992, p9)	Dehydrogenases,Oxidases,Oxidoreductase,Reductases,Dehydrogenase,Oxidase,Reductase
D010089	Oxidoreductases, N-Demethylating		N-Demethylase,N-Demethylases,Oxidoreductases, N Demethylating,Demethylating Oxidoreductases, N,N Demethylase,N Demethylases,N Demethylating Oxidoreductases,N-Demethylating Oxidoreductases
D011078	Polychlorinated Biphenyls	Industrial products consisting of a mixture of chlorinated biphenyl congeners and isomers. These compounds are highly lipophilic and tend to accumulate in fat stores of animals. Many of these compounds are considered toxic and potential environmental pollutants.	PCBs,Polychlorinated Biphenyl,Polychlorobiphenyl Compounds,Biphenyl, Polychlorinated,Biphenyls, Polychlorinated,Compounds, Polychlorobiphenyl
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D001189	Aryl Hydrocarbon Hydroxylases	A large group of cytochrome P-450 (heme-thiolate) monooxygenases that complex with NAD(P)H-FLAVIN OXIDOREDUCTASE in numerous mixed-function oxidations of aromatic compounds. They catalyze hydroxylation of a broad spectrum of substrates and are important in the metabolism of steroids, drugs, and toxins such as PHENOBARBITAL, carcinogens, and insecticides.	Microsomal Monooxygenases,Xenobiotic Monooxygenases,Hydroxylases, Aryl Hydrocarbon,Monooxygenases, Microsomal,Monooxygenases, Xenobiotic
D051381	Rats	The common name for the genus Rattus.	Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus